US 12,451,272 B2
Pressurization and heating device and method for insulation system restoration of a power cable
Kristian Gustafsson, Karlskrona (SE); and Jörn Antonischki, Fågelmara (SE)
Assigned to NKT HV Cables AB, Lyckeby (SE)
Filed by NKT HV Cables AB, Lyckeby (SE)
Filed on Jun. 24, 2022, as Appl. No. 17/808,918.
Claims priority of application No. 21182096 (EP), filed on Jun. 28, 2021.
Prior Publication US 2022/0415542 A1, Dec. 29, 2022
Int. Cl. H01B 13/00 (2006.01); B29C 73/34 (2006.01); F27B 5/04 (2006.01); F27D 11/06 (2006.01); B29L 31/34 (2006.01)
CPC H01B 13/0016 (2013.01) [B29C 73/34 (2013.01); F27B 5/04 (2013.01); F27D 11/06 (2013.01); B29L 2031/3462 (2013.01); F27M 2003/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A pressurisation and heating device for restoring an insulation system of a power cable, the pressurisation and heating device comprising:
a first part including a first channel configured to receive a portion of the power cable,
a second part including a second channel configured to receive a portion of the power cable,
wherein the pressurisation and heating device is configured to be set in a closed state in which the first channel faces the second channel thereby forming a heating chamber extending from a first end to a second end, opposite the first end, of the pressurisation and heating device,
wherein the pressurisation and heating device is configured to be pressurised via a gas flowed into the heating chamber, to obtain a pressure higher than atmospheric pressure inside the heating chamber when the power cable is arranged sealed in the heating chamber,
wherein the pressurisation and heating device has an at least 20 cm long axially extending section which is primarily made of material at most having a conductivity of the order of 1000 S/m at 20° C., wherein the axially extending section is at least a portion of the pressurisation and heating device.